Forward Grade 8 Statistics & Probability. Practice it free.

Investigates patterns of association in bivariate data. This Grade 8 reporting domain maps to 1 practice skill and 8 representative questions from the playable bank.

Grade 81 mapped skills

What the test measures

Statistics & Probability skills

Construct and interpret scatter plots for bivariate measurement data to investigate patterns of association
Informally fit a function to data and solve problems in the context of the data
Use lines of best fit to model association in scatter plots
Analyze the relationship between two variables using graphs and equations
Understand that straight lines are widely used to model linear relationships

Standards basis

Wisconsin Standards for Mathematics — Wisconsin

How the Forward reports it

Wisconsin’s Forward Exam is a state assessment designed to measure students against the recently updated Wisconsin Academic Standards, rather than a separate national framework. The official Forward Exam page confirms the math assessment is administered in grades 3-8 and is aligned to the Wisconsin Academic Standards, but it does not publish a math-specific blueprint on the page itself.

Blueprint & weighting

Not published in the official Forward Exam page content available here. The page confirms alignment to Wisconsin Academic Standards and administration in grades 3-8, but no math blueprint percentages or reporting-category weights are provided on the page content retrieved.

Official sources

Wisconsin DPI Forward Exam
Wisconsin DPI Mathematics in Wisconsin

Practice by skill

Topics mapped to this domain

Scatterplots and trend lines

Grade 818 questions

Try it now

8 free questions · 0/0 correct

Practice playeasy

A trend line predicts that a bakery will sell $75$ bagels on Monday. The bakery actually sells $79$ bagels. What is the residual (actual value minus predicted value)?

Residual $=$ actual $-$ predicted $= 79 - 75 = 4$ .

Practice playeasy

A line of best fit relating hours of practice $x$ to free throws made $y$ is $y = 6x + 10$ . According to the line, each additional hour of practice adds about how many free throws?

The slope of $y = 6x + 10$ is $6$ : the predicted change in free throws for each extra hour of practice.

Practice playeasy

A trend line for the daily high temperature $x$ in degrees and cups of lemonade sold $y$ is $y = 2x - 60$ . For a predicted $100$ cups sold, what should the temperature be?

Solve $100 = 2x - 60$ : $2x = 160$ , so $x = 80$ degrees.

Practice playeasy

A trend line for the number of car washes a club holds $x$ and the club's funds $y$ in dollars is $y = 75x + 120$ . According to the line, how many dollars did the club have before holding any car washes?

At $x = 0$ , $y = 120$ dollars: the $y$ -intercept is the starting amount.

Practice playeasy

A trend line for miles jogged $x$ and calories burned $y$ is $y = 90x + 20$ . How many calories does the line predict for a $4$ -mile jog?

$y = 90(4) + 20 = 360 + 20 = 380$ calories.

Practice playeasy

A trend line predicts Mia will spell $18$ words correctly in a spelling bee. She actually spells $21$ words correctly. What is the residual (actual minus predicted)?

Residual $= 21 - 18 = 3$ words.

Practice playeasy

A line of best fit for the number of lawns Jaden mows $x$ and his savings $y$ in dollars is $y = 15x + 40$ . According to the line, how many dollars did Jaden have saved before mowing any lawns?